of detboit



V. A. FOX

OVEN AND DIP TANK Jan. 27, 1931.

Filed June 22. 1928- attorno? t Patented Jan., 21, 1931 Ultu'rlazosifa'luesA PATENT ori-ICE VEBNIE A. FOX, OF DETROIT, MICHIGAN, ABSIGNOB TO YOUNG BROTHBS COMPANY,

OF IPETBOIT, MICHIGAN, UOBPOBATION OF MICHIGAN OVEN AND DIP TANK application tutti :une aa,

The present invention pertains toa novel pings will fall directly upon a drain board.

rather than on other'V plates. V The invention is fully disclosed by way 15 of example in the followingdescription and in the accompanying drawings, in which- Figure 1 is a vertical section of the device; Fig. 2 is a vertical section beneath the forward wall; 7 Y

Fign is a vdetail section of the conveyorin a plane parallel to that of Figure 1; and

Fig. 4 is an elevation at rightl angles to Figure 3, partly in section. l Reference to these views will now be made 25 by use of like characters which are employed to designate corresponding parts throughout. In Figure. 1 is shown a framework l which supports an inclined oven comprised of parallel inclined walls 2 and 3, a top 4, and lateral walls 5'and 6. The lower part of the oven is open and is positioned over a dip tank 7. Shafts 8 and 9 are journalled in the upper and lower ends respectively of the oven and carryv each a pair of sprocket wheels 10 and 11. -Each pair of aligned wheels is trained by an endless sprocket chain consisting of double links 12 united by hinge pins 13. Certain of the pins are extended slightly inward as'at 14 for the purpose of supporting parallel tubes 15 as shown'in Figure 4, whereby the conveyor chain is completed. Hooks 16 of S-shape are suspended from the rods for the purpose of supporting apertured plates which will maintain a vertical 45 position while being carried by the conveyor. Between the framework 1 and lateral wall .5 is supported a shelf 17 on which is mounted a motor 18 for driving the shaft 8 through gearing 19. At the base of the conveyor are 5 provided a pair of upright bearings 20 hav- 192s. seal no. 287,524.

ingeach a slot 21 in which the ends of the shaft 9 are accommodated. The lateral walls 5 and 6 are lsimilarly slotted for the shaft. Each end of the shaft 9 is surrounded by a loose collar 22 connected by a retractile spring 23l to a lug l24 extending from the corresponding bearing 2U, whereby the shaft is maintalned in its lowest possible position and the conveyor chains are held taut at all times 1n response to contraction and expansion thereof due to the heat conditions in the oven.

The sprocket wheels 10 and 11 are caused to turn in counterclockwi'se direction as f viewed in Figure 1, so that the la adjacent the front wall 2 moves downward towards the tank 7. Directly above the tan ,the forward wall is formed with an openingv 25 which serves as the air inlet and also the entrance for work to be hung on the hooks 16. At the opposite side or wall 3 of the conn veyor is an air exhaust'port 26 connected to an exhaust fan 27 by means of a pipe 28. The fan is mounted on a shelf 29 secured between the frame 1 andthe wall 3. The lower part of the wall 3 is comprised of a suitable drain plate 30, at the lower edge of which is a tra 31 having its'base below the upper level o the dip tank 7 and having a drain pipe 32 leading from the base.

Aheating element 33 of any desired character is positioned between the two sides of the conveyor, preferably a short distance beneath the shaft 8. A baiiie 34 is also mounted between the laps of the conveyor and has its longitudinal edges fixed in the lateral walls 5 and 6.- The upper part of the baffle is bent at 35 to extend between the heating element and the ascending side of the conveyor so that it functions as a partition to prevent direct flow of hot air from the heating element to the exhaust port 26. y

In the operation of the device the work is 'entered through the opening 25 and suspended on the hooks 16 as already stated. The work immediately -enters the dip tank and is carried upwardly by the ascending side of the conveyor, during which time it is permitted to drain upon the plate 30 and into the trough 31. While rising to the level of the exhaust port 26, the work is in a comparatively cool zone of the oven, so that it may properly drain before the excess coating becomes baked thereon. When the work has passed in to the hotter-region above the exhaust port, the excess coating has drained ofi. It is to be noted that the permanent vertical position and spaced relation of the plates prevents the drippings from upper plates to fall on lower platesv` and in this way one of the principal diiculties'in dipping practice is overcome. The work undergoes further drying treatment until reaching the opening 25 on the descent. and is then removed from the oven through the same opengAlthough a specific embodiment of the invention has been illustrated and described, it will be understood that various alterations in the details of construction,A may be made without departing from the scope of the invention-as indicated by the appended claims.

1. In combination with an inclinedendless conveyor, a dip tank at the lower end thereof and adapted to receive articles carried by the conveyor, a heating element between the laps of the conveyor, and a baille between said element and one of said laps.

2. In combination with an inclined endless conveyor, a dip tank at the lower end thereof and adapted foreceive articles car-Y closing said conveyor, air inlet and exhaust means at opposite sides of the oven, and a bailie between said heating element and e'xhaust means.

3. In combination with an inclined endless conveyor, `a dip tank at the lower end thereof and adapted to receive articles carried by the conveyor, a heating element between the laps ofithe conveyor; an oven enclosing said conveyor, air inlet and exhaust means at opposite sides of the oven,said inlet means being adapted for entrance of work into the oven, and a baille between said heating element and exhaust means.

4. In combination with an inclined endless conveyor, a dip tank at the lower end` thereof and adapted to receive articles carried by the conveyor, a heating element between the laps of the conveyor, an oven enclosing said conveyor, air inlet and exhaust means in said oven at the descending and ascending sides respectively of said conveyor, and a baille between said heating element and air exhaust means.

5. In combination with an inclined endless conveyor, a dip tank at the lower end thereof and adapted to receive articles carried by the conveyor, a heatingelement between the laps of the conveyor, an oven enclosing ,said conveyor, air inlet and exhaust means in said oven at the descending and ascending sides respectively of said conveyor,

said inlet means being adapted for entrance of work into the oven, and a baille between said heating element and air exhaust means.

6. In combination with an inclined endless conveyor, a dip tank at the lower end thereof and adapted to receive articles carried by the conveyor, a heating element between the laps ofthe conveyor, an oven enclosing said conveyor, air inlet and exhaust means in said oven at the descending and ascendin sides respectively/of said conveyor, a baie etween said heating element and air exhaust means, said exhaust means being disposed at asubstantial distance above the dip tank, and the oven wall benexitkisaid n'eans being adapted tofunction as a rain ate. p In testimony whereof I aix my signature.

VERNIE A. FOX. 

